US4491536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon fiber-containing fluoroelastomer composition
Assignee: Daikin Industries Ltd
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Filing: 1983-09-29
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Granted: 1985-01-01
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Expires: 2003-09-29
Abstract
Abstract A fluoroelastomer composition comprising a cross-linkable fluoroelastomer and/or a thermoplastic fluoroelastomer and carbon fiber having a low volume resistivity of 10 -1 to 10 13 ohm.cm.
Inventors
- 👤 Masayasu Tomoda
- 👤 Shoji Kawachi
- 👤 Hiroyuki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:14
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A fluoroelastomer composition comprising a fluoroelastomer selected from at least one member of the group consisting of a cross-linkable fluoroelastomer and a thermoplastic fluoroelastomer and carbon fibers having a length of from 0.1 to 5.0 mm and a length/diameter ratio of at least 10, said carbon fiber being present in said composition in an amount of from 1 to 300 parts by weight on the basis of 100 parts by weight of the fluoroelastomer.
Claim 2
Dependent Claim
74 words
A fluoroelastomer composition comprising a fluoroelastomer selected from at least one member of the group consisting of a cross-linkable fluoroelastomer and a thermoplastic fluoroelastomer and carbon fibers having a length of from 0.1 to 5.0 mm and a length/diameter ratio of at least 10, said carbon fiber being present in said composition in an amount of from 1 to 300 parts by weight on the basis of 100 parts by weight of the fluoroelastomer.
Claim 3
Dependent Claim
13 words
A composition according to claim 1, wherein the fluoroelastomer is a cross-linkable fluoroelastomer.
Claim 4
Dependent Claim
37 words
A composition according to claim 2, wherein said fluoroelastomer is selected from the group consisting of vinylidene fluoride/hexafluoropropylene copolymers, vinylidene fluoride/tetrafluoroethylene/hexafluoropropylene terpolymers, vinylidene fluoride/chlorotrifluoroethylene copolymers, tetrafluoroethylene/propylene copolymers, hexafluoropropylene/ethylene copolymers, perfluoroalkyl vinyl ether/olefin copolymers, fluorosilicone elastomers, fluorophosphazene elastomers.
Claim 5
Dependent Claim
22 words
A composition according to claim 2, which further comprises a liquid fluoroelastomer having a number average molecular weight of 500 to 20,000.
Claim 6
Dependent Claim
13 words
A composition according to claim 1, wherein said fluoroelastomer is a thermoplastic fluoroelastomer.
Claim 7
Dependent Claim
39 words
A composition according to claim 5, wherein said thermoplastic fluoroelastomer comprises a polymeric chain comprising at least one elastomeric polymer segment and at least one non-elastomeric polymer segment, at least one of these segments being a fluorine-containing polymer segment.
Claim 8
Dependent Claim
25 words
A composition according to claim 6, wherein the weight ratio of the elastomeric polymer segment and the non-elastomeric polymer segment is from 40:60 to 95:5.
Claim 9
Dependent Claim
216 words
A composition according to claim 5, wherein the thermoplastic fluoroelastomer comprises a polymeric chain comprising two or three polymer segments, at least one iodine atom liberated from an iodinated compound and bonded to a terminal carbon atom of the polymeric chain and a fragment of the iodinated compound excluding said liberated iodine atom therefrom; one polymer segment (when the polymeric chain comprises two polymer segments) or one or two polymer segments (when the polymeric chain comprises three polymer segments) being elastomeric polymer segment(s) having a molecular weight of from 30,000 to 1,200,000 selected from the group consisting of (1) a vinylidene fluoride/hexafluoropropylene/tetrafluoroethylene a vinylidene fluoride/pentafluoropropylene/tetrafluoroethylene polymer in a molar ratio of 45-90:5-50:0-35 and (2) a perfluoro(C 1 -C 3 -alkyl vinyl ether) (including those having plural ether linkages)/tetrafluoroethylene/vinylidene fluoride polymer in a molar ratio of 15-75:0-85:0-85, the other polymer segment(s) being a non-elastomeric polymer having a molecular weight of from 3,000 to 400,000 selected from the group consisting of (3) a vinylidene fluoride/tetrafluoroethylene polymer in a molar ratio of 0:100 to 100:0 and (4) a ethylene/tetrafluoroethylene/hexafluoropropylene, 3,3,3-trifluoropropylene-1,2-trifluoromethyl-3,3,3-trifluoropropylene-1 or perfluoro(C 1 -C 3 -alkyl vinyl ether) (including those having plural ether linkages) polymer in a molar ratio of 40-60:60-40:0-30, the weight ratio of the elastomeric polymer segment and the non-elastomeric polymer segment being from 40:60 to 95:5.
Claim 10
Dependent Claim
32 words
A composition according to claim 1, wherein the amount of the carbon fiber is preferably 20 to 50 parts by weight on the basis of 100 parts by weight of the fluoroelastomer.
Claim 11
Dependent Claim
24 words
A composition according to claim 1, which further comprises an inorganic compound which is treated to impart electric conductivity and/or electrically conductive carbon black.
Claim 12
Dependent Claim
17 words
A composition according to claim 1, which is in solution form or a suspension in a solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |